flaky test TestFrameworkPauseAndResume

[hawkingrei]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

2. What did you expect to see? (Required)

3. What did you see instead (Required)

     framework_pause_and_resume_test.go:40: 
        	Error Trace:	pkg/disttask/framework/integrationtests/framework_pause_and_resume_test.go:40
        	            				pkg/disttask/framework/integrationtests/framework_pause_and_resume_test.go:56
        	Error:      	Not equal: 
        	            	expected: 4
        	            	actual  : 7
        	Test:       	TestFrameworkPauseAndResume 

https://tiprow.hawkingrei.com/view/gs/pingcapprow/pr-logs/pull/pingcap_tidb/51550/fast_test_tiprow/1767419669691502592

4. What is your TiDB version? (Required)